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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libstdc++-v3/] [testsuite/] [27_io/] [basic_istream/] [seekg/] [wchar_t/] [fstream.cc] - Blame information for rev 19

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1 19 jlechner
// Copyright (C) 2004 Free Software Foundation
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//
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// This file is part of the GNU ISO C++ Library.  This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING.  If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// 27.6.1.3 unformatted input functions
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// NB: ostream has a particular "seeks" category. Adopt this for istreams too.
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// @require@ %-*.tst %-*.txt
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// @diff@ %-*.tst %-*.txt
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#include <istream>
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#include <sstream>
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#include <fstream>
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#include <testsuite_hooks.h>
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// fstreams
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void test04(void)
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{
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  typedef std::wistream::off_type off_type;
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  bool test __attribute__((unused)) = true;
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  std::wistream::pos_type pos01, pos02, pos03, pos04, pos05, pos06;
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  std::ios_base::iostate state01, state02;
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  const char str_lit01[] = "wistream_seeks-1.txt";
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  const char str_lit02[] = "wistream_seeks-2.txt";
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  std::wifstream if01(str_lit01, std::ios_base::in | std::ios_base::out);
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  std::wifstream if02(str_lit01, std::ios_base::in);
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  std::wifstream if03(str_lit02, std::ios_base::out | std::ios_base::trunc);
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  VERIFY( if01.good() );
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  VERIFY( if02.good() );
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  VERIFY( if03.good() );
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  std::wistream is01(if01.rdbuf());
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  std::wistream is02(if02.rdbuf());
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  std::wistream is03(if03.rdbuf());
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  pos01 = is01.tellg();
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  pos02 = is01.tellg();
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  pos03 = is02.tellg();
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  pos04 = is02.tellg();
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  pos05 = is03.tellg();
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  pos06 = is03.tellg();
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  // istream& seekg(pos_type)
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  // istream& seekg(off_type, ios_base::seekdir)
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  // cur 
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  // NB: see library issues list 136. It's the v3 interp that seekg
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  // only sets the input buffer, or else istreams with buffers that
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  // have _M_mode == ios_base::out will fail to have consistency
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  // between seekg and tellg.
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  state01 = is01.rdstate();
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  is01.seekg(10, std::ios_base::cur);
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  state02 = is01.rdstate();
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  pos01 = is01.tellg();
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  VERIFY( pos01 == pos02 + off_type(10) );
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  VERIFY( state01 == state02 );
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  pos02 = is01.tellg();
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  VERIFY( pos02 == pos01 );
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  state01 = is02.rdstate();
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  is02.seekg(10, std::ios_base::cur);
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  state02 = is02.rdstate();
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  pos03 = is02.tellg();
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  VERIFY( pos03 == pos04 + off_type(10) );
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  VERIFY( state01 == state02 );
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  pos04 = is02.tellg();
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  VERIFY( pos03 == pos04 );
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  state01 = is03.rdstate();
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  is03.seekg(10, std::ios_base::cur);
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  state02 = is03.rdstate();
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  pos05 = is03.tellg();
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  VERIFY( pos05 == pos06 + off_type(10) );
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  VERIFY( state01 == state02 );
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  pos06 = is03.tellg();
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  VERIFY( pos05 == pos06 );
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  // beg
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  state01 = is01.rdstate();
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  is01.seekg(20, std::ios_base::beg);
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  state02 = is01.rdstate();
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  pos01 = is01.tellg();
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  VERIFY( pos01 == pos02 + off_type(10) );
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  VERIFY( state01 == state02 );
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  pos02 = is01.tellg();
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  VERIFY( pos02 == pos01 );
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  state01 = is02.rdstate();
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  is02.seekg(20, std::ios_base::beg);
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  state02 = is02.rdstate();
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  pos03 = is02.tellg();
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  VERIFY( pos03 == pos04 + off_type(10) );
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  VERIFY( state01 == state02 );
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  pos04 = is02.tellg();
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  VERIFY( pos03 == pos04 );
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  state01 = is03.rdstate();
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  is03.seekg(20, std::ios_base::beg);
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  state02 = is03.rdstate();
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  pos05 = is03.tellg();
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  VERIFY( pos05 == pos06 + off_type(10) );
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  VERIFY( state01 == state02 );
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  pos06 = is03.tellg();
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  VERIFY( pos05 == pos06 );
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}
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int main()
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{
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  test04();
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  return 0;
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}

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